c("tissue: CVS tissue", "genetic variation: normal")
c("tissue: CVS tissue", "genetic variation: normal")
c("tissue: CVS tissue", "genetic variation: normal")
c("tissue: CVS tissue", "genetic variation: normal")
c("tissue: CVS tissue", "genetic variation: normal")
c("tissue: Fetal placenta tissue", "genetic variation: Trisomy 21")
c("tissue: CVS tissue", "genetic variation: Trisomy 21")
c("tissue: Fetal placenta tissue", "genetic variation: Trisomy 21")
c("tissue: Fetal placenta tissue", "genetic variation: Trisomy 21")